Re: [Condor-users] Condor and KVM: cannot connect to qemu:///session

["Timothy St. Clair" <tstclair@xxxxxxxxxx>]

If you can verify that your libvirtd is running & qemu+kvm are installed
properly (check via virsh command prompt), then it is likely a
permissions issue.  Condor's vm-gahp requires it be started with
elevated priv's(~root) in order to communicate with the libvirtd.  

Cheers,
Tim

On Mon, 2010-12-13 at 12:01 -0500, Ryan Jansen wrote:
> Hi Tim,
> 
> Thanks for the email and sorry for taking so long to get back to you.
> 
> I'm using libvirt version 0.6.3.
> 
> Ryan
> 
> On Wed, Dec 8, 2010 at 11:13 AM, Timothy St. Clair
> <tstclair@xxxxxxxxxx> wrote:
>         what version of libvirt are you using?
>         
>         Cheers,
>         Tim
>         
>         
>         On Tue, 2010-12-07 at 16:36 -0500, Ryan Jansen wrote:
>         > Hi everyone,
>         >
>         > I'm having a problem getting Condor to start up a KVM
>         virtual machine
>         > in Condor. I posted an email before, and with advice from a
>         few
>         > people, I was able to sort out my KVM problems. But now,
>         whenever I
>         > run a vm universe job, the condor_vm-gahp fails with the
>         following
>         > error:
>         >
>         > 12/07 16:18:12 ** condor_vm-gahp (CONDOR_VM_GAHP) STARTING
>         UP
>         > 12/07 16:18:12
>         >
>         ** /afs/nd.edu/user37/condor/software/versions/amd64-redhat5/condor-7.4.2-dynamic/sbin/condor_vm-gahp
>         > 12/07 16:18:12 ** SubsystemInfo: name=VM_GAHP type=GAHP(9)
>         > class=DAEMON(1)
>         > 12/07 16:18:12 ** Configuration: subsystem:VM_GAHP
>         local:<NONE>
>         > class:DAEMON
>         > 12/07 16:18:12 ** $CondorVersion: 7.4.2 Mar 29 2010 BuildID:
>         227044 $
>         > 12/07 16:18:12 ** $CondorPlatform: X86_64-LINUX_RHEL5 $
>         > 12/07 16:18:12 ** PID = 13583
>         > 12/07 16:18:12 ** Log last touched 12/7 16:18:10
>         > 12/07 16:18:12
>         ******************************************************
>         > 12/07 16:18:12 Using config
>         > source: /afs/nd.edu/user37/condor/condor_config
>         > 12/07 16:18:12 Using local config sources:
>         > 12/07
>         > 16:18:12
>          /afs/nd.edu/user37/condor/software/config/machines/dqcneh100.local
>         > 12/07 16:18:12 DaemonCore: Command Socket at
>         <10.32.72.74:9118>
>         > 12/07 16:18:12 VMGAHP[13583]: VM-GAHP initialized with
>         run-mode 3
>         > 12/07 16:18:12 VMGAHP[13583]: Initial UID/GUID=0/0,
>         > EUID/EGUID=126019/1313, Condor UID/GID=108172,40
>         > 12/07 16:18:12 VMGAHP[13583]: Initialize Uids: caller=root,
>         job
>         > user=rjansen
>         > 12/07 16:18:18 ERROR "Failed to create libvirt connection:
>         could not
>         > connect to qemu:///session" at line 989 in file xen_type.cpp
>         >
>         > Now, I have adjusted /etc/libvirt/libvirt.conf to allow the
>         libvirt
>         > group to access the libvirt rw socket, and I added the users
>         root,
>         > rjansen, and condor to that group.
>         >
>         > Additionally, I can connect just fine (as root and rjansen)
>         to
>         > qemu:///session, through virsh, and through the libvirt C
>         library
>         > using example code from the qemu website. In fact, the code
>         I use to
>         > connect to the library in the example program is essentially
>         the same
>         > as the code on line 989 in xen_type.cpp, which is failing.
>         >
>         > I'm not sure if I'm doing something wrong with Condor or
>         something
>         > wrong with KVM/libvirt, but I'd like to get this working.
>         >
>         > Does anyone have any ideas on how to fix this problem?
>         >
>         > Thanks,
>         > Ryan
>         
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